Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7d822422d62fd5…

MALICIOUS

PDF

36.6 KB Created: 2020-06-05 05:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 0345cbcf90a5444f66ba7c9b7770b7a6 SHA-1: 1f329f14ec0d14e506c1d50114d8a7ca72f00ea5 SHA-256: de7d822422d62fd5efc338bb29009d024bc6065369c6976f745d448f4bb52ad5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, many of which point to domains that appear to be part of a link farm. The primary purpose seems to be to host a large number of PDF files, likely to distribute malicious content or engage in SEO-based phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://mta-sts.mail.jacquelineclewis.com/uploads/1/3/0/7/130776164/130776164.html#5e+blood+magic PDF link annotation
    • http://femmebeautyloungeorlandpark.com/uploads/1/3/1/8/131856476/3154808.pdfIn PDF document text
    • http://northcountymomsforspecialkids.com/uploads/1/3/0/4/130490833/6ce04.pdfIn PDF document text
    • http://corvallisyogaon6th.com/uploads/1/3/0/7/130776233/mesepivapukakote.pdfIn PDF document text
    • http://550kirklandway.com/uploads/1/3/0/7/130776791/suver_gufupizem_dijesukuja_kozug.pdfIn PDF document text
    • http://therackoutlet.com/uploads/1/3/1/0/131070612/2065942.pdfIn PDF document text
    • http://webdisk.globalconnectionafrica.org/uploads/1/3/0/3/130323515/5149317.pdfIn PDF document text
    • http://portagejiu-jitsu.net/uploads/1/3/0/6/130640164/jenewabasusen.pdfIn PDF document text
    • http://mailserver.bmorecoaching.com/uploads/1/3/0/6/130604780/a6ed1.pdfIn PDF document text
    • http://cunsoul.com/uploads/1/3/0/4/130475909/5756174.pdfIn PDF document text
    • http://gailsuberbiellephotography.shop/uploads/1/3/0/7/130776164/gujarikagi.pdfIn PDF document text
    • http://streetwiseglobal.com/uploads/1/3/0/7/130776363/bekanejo-sefumorobij-xojidujapol-potekaxix.pdfIn PDF document text
    • http://mta-sts.mail.jacquelineclewis.com/uploads/1/3/0/7/130776164/terms.htmlIn PDF document text
    • http://mta-sts.mail.jacquelineclewis.com/uploads/1/3/0/7/130776164/dmca.htmlIn PDF document text
    • http://mta-sts.mail.jacquelineclewis.com/uploads/1/3/0/7/130776164/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gamekupori.files.wordpress.com/2020/06/sefirafa.pdfIn PDF document text
    • https://xunajov743498637.files.wordpress.com/2020/06/29854010007.pdfIn PDF document text
    • https://wesijirapi.files.wordpress.com/2020/06/dusisavokevesimujetupov.pdfIn PDF document text
    • https://vizimixez.files.wordpress.com/2020/06/mukegajukejozawoxa.pdfIn PDF document text
    • https://zubugoko.files.wordpress.com/2020/06/buzuzew.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6580 9896 bytes
SHA-256: ad19abe7963a972eb1489c595fa50e1ec7490ca03ae23ab2ffb1e6f065609e6d

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